Sudden stoppage of work Beko refrigerator often becomes an unpleasant surprise, especially if there are perishable products inside. In most cases, when the compressor hums but does not start, or the unit is completely silent, the cause is a failure of the start-up relay. This small but critically important unit is responsible for supplying voltage to the motor windings and protecting it from overloads. Beko refrigerator
Understanding this will allow you to save a significant amount on calling a technician and quickly bring the equipment back to life. Diagnostics of this element does not require deep engineering knowledge, but requires care and compliance with electrical safety rules when working with household appliances. how to check the Beko refrigerator relay, will allow you to save a significant amount on calling a technician and quickly bring your equipment back to life. Diagnostics of this element does not require deep engineering knowledge, but requires care and compliance with electrical safety rules when working with household appliances.
In this article we will analyze in detail the device of the unit, the symptoms of its breakdown and a step-by-step testing algorithm using a multimeter. You will learn what to look for during a visual inspection and how to correctly interpret the readings of measuring instruments to make the right repair decision.
Design and functions of a start-up relay
A start-up relay in refrigerators Beko is an electromechanical device that controls the process of starting the compressor. It is connected directly to the motor terminals and, depending on the refrigerator model, may have a different design. The main components are a starting coil, breaking contacts and a bimetallic plate that responds to temperature.
The main task of the element is to briefly apply current to the starting winding of the motor to create torque, and then turn it off, leaving only the main winding to work. In parallel with this, the built-in thermal release monitors the current strength: if it exceeds the norm due to jamming of the piston group or a voltage surge, the circuit opens, preventing the motor from burning out.
There are two main types of relays used in household appliances: induction (work on the principle of an electromagnet) and posistor (use a thermistor). In modern models Beko refrigerators there are more often posistor options, which are considered more reliable, but are also subject to wear. Understanding the type of your device is important for correct diagnosis.
⚠️ Attention: Before any manipulations with the electrical components of the refrigerator, be sure to unplug the device. Even after switching off, a residual charge may remain in the capacitors, which can cause an electric shock.
Difference between induction and posistor relays
An induction relay uses an electromagnetic coil to open the contacts when a certain shaft rotation speed is reached. A posistor relay works by heating a thermistor (posistor): in a cold state it has low resistance and passes current, and when heated, the resistance increases sharply, actually opening the starting winding circuit.
Main signs of a faulty start relay
Diagnostics often begin with an analysis of the behavior of the refrigerator. If you notice that compressor tries to start, makes a clicking noise and immediately goes silent, this is a classic symptom of a problem with the starting mechanism. The engine may hum for several seconds, heat up, but the shaft does not rotate, after which the thermal protection is triggered.
Another obvious sign is the complete lack of reaction of the refrigerator when plugged in, although the light in the chamber is on. In this case, the relay may be completely broken inside, and the current simply does not reach the motor windings. It is also worth paying attention to the appearance: a blackened case or melted contacts indicate overheating and breakdown.
Users often confuse a relay failure with a malfunction of the compressor itself. To differentiate these problems, you need to listen to the nature of the sound. Clicks with a frequency of 10-20 seconds indicate the operation of a thermal relay, which turns on and off cyclically, preventing the motor from starting. This indicates that starting relay does not perform its function of switching windings.
- 🔊 The compressor hums for 5-10 seconds, then a click is heard and silence sets in.
- 🔥 The relay or compressor housing is strong heats up in the lower part of the refrigerator.
- 🚫 The refrigerator is plugged in, the lamp is on, but there is no sound of the motor running.
- ⚡ When plugged into the network, it immediately knocks out the circuit breakers or plugs.
Visual inspection and initial diagnosis
The first stage of inspection should always be a thorough visual inspection. Remove the back panel of the refrigerator Bekoto gain access to the compressor. The relay is usually placed on the side pins of the motor and covered with a plastic casing. Carefully remove the fasteners and remove the assembly.
Inspect the housing for cracks, signs of burning or melted plastic. If you see black spots inside the relay or smell burnt insulation, further inspection may not be necessary - the element definitely needs to be replaced. Also check the integrity of the wires going to the connector.
It is important to check the condition of the contacts. If they are oxidized or burnt, the contact will be unstable, leading to sparking and repeated failure. In some cases, the problem can be solved by stripping the contacts, but if the mechanism itself or the posistor is damaged, a complete replacement will be required.
Instrumental testing with a multimeter
For accurate diagnostics, you will need a multimeter switched to resistance measurement mode (Ohm). This method allows you to determine the integrity of internal circuits and the performance of a posistor or coil. Before starting measurements, make sure that the relay is completely disconnected from the compressor and power wires.
First check the circuit between the input contacts. If the device shows infinity (one on the screen), it means there is an open circuit. If zero, a short circuit is possible. The normal resistance of the starting winding and relay coil varies, but should not be equal to zero or infinity.
Pay special attention to checking the posistor. When cold, it should have a small resistance (usually a few tens of ohms). When heated (which is difficult to check without special equipment at home), the resistance should increase. If the multimeter shows a stable zero or infinity regardless of the state, the posistor is faulty.
☑️ Checklist for checking with a multimeter
Fault diagnosis table
For the convenience of systematizing the data obtained during testing Beko refrigerator relay a table has been compiled. It will help compare symptoms, instrument readings and visual signs to make an accurate diagnosis.
| Symptom | Multimeter readings | Visual signs | Probable cause |
|---|---|---|---|
| Clicks, no start | Open circuit (∞) | No visible damage | The starting coil or posistor is burnt out |
| Humming, knocks out plugs | Short circuit (0 Ohm) | Molted body, burning smell | Sticking contacts or insulation breakdown |
| The refrigerator is silent | Normal | Oxidized contacts | Poor contact in the connector, oxidation |
| Frequent on/off | Resistance is normal | Darkening of the plastic | Malfunction of the thermal protection or compressor |
⚠️ Attention: The technical characteristics of the relay (resistance, type of connection) may vary depending on the specific model of the compressor installed in your refrigerator Beko. Always check the parameters of the new part with the markings of the old one.
Replacing the relay: step-by-step instructions
If the check confirms a malfunction, the only correct solution is to replace the element. Repairing the internal components of the relay at home is impractical, as it requires factory calibration and sealing. Buy an analogue that fully matches the markings of your device.
The replacement process is simple: remove the old relay, disconnecting the wires (if they are not on a common block), and install a new one on the compressor pins. Orientation is important: there is usually an arrow on the housing indicating the "UP" position. Incorrect installation may result in the mechanism not working.
After installation, connect the wires, secure the casing and turn on the refrigerator. The first minutes of operation should pass without clicks or buzzing. The compressor should start smoothly and run smoothly. If the symptoms recur, perhaps the problem lies deeper - in the compressor itself or the wiring.
Frequently asked questions (FAQ)
Is it possible to start a refrigerator Beko without a relay?
Theoretically, you can start the compressor directly by applying voltage to the operating and starting windings, but doing this is strictly not recommended for continuous operation. Without a starting relay and thermal protection, the compressor will burn out in a few minutes or switching cycles due to the lack of disconnection of the starting winding and overload protection.
Where can I find the relay markings for purchase?
The markings are usually applied to the side or top of the plastic housing of the relay. Look for codes starting with letters (eg R, K, M) and numbers. Also, the part number can be found in the service documentation of your model Beko refrigerator or on the sticker inside the chamber.
Why does the new relay burn out after a short time?
A common reason for repeated combustion is a malfunction of the compressor itself. If the motor is “heavy” (wear of the mechanical part) or has an interturn short circuit, it consumes a current higher than the rated one, which leads to overheating and destruction of the relay contacts. Also, the cause may be unstable voltage in the network.
How much does it cost to replace a relay?
The cost of the relay itself for refrigerators Beko varies depending on the type and supplier, but usually it is an inexpensive part. The main part of the costs when calling a technician is labor and diagnostics, so independent replacement is economically profitable.